Drier for slashers



May 13, 1952 s. 1.. BALL DRIER FOR SLASHERS 5 Shee ts-Sheet 1 Filed March 22, 1949 INVENTOR. GAINES LAMAR BALL BY @r/ 7;

ATTORNEY FIG. 2

y 3, 1952 G. 1.. BALL 2,596,358

' DRIER FOR SLASHERS Filed March 22, 1949 '3 Sheets-Sheet 2 JNVENTOR. GAINES' LAMAR BALL A-BY ATT ORNEY May 13, 1952 s. L. BALL 2,596,358

DRIER FOR SLASHERS Filed March 22, 1949 I5 Sheets-Sheet 3 INVENTOR. GAEMES LAMAR ALL ATTORNEY Patented May 13, 1952 DRIER FOR SLASHERS Gaines Lamar Ball, West Point, Ga., assignor to Batson-Cook Company, West Point, 6a., a corporation of Georgia Application March 22 1949, Serial No. 82,789

8 Claims. 1

This invention relates to an improved dryer for slashers, and more particularly to a dryer utilizing both convection and contact drying.

Slashers are used in the textile industry to apply starch or other liquid preparations to yarn preparatory to winding onto a loom beam for weaving, and a dryer is needed to remove the moisture that is picked up. Dryers of the heated cylinder type, hot air type and radiant heat type have been used with slashers, but all have their inherent disadvantages which are overcome by the dryer of my improved construction.

An object of my invention is to provide a dryer for slashers which utilizes both convection and contact drying.

Another object of my invention is to provide a completely insulated dryer in which a fluid drying medium may be recirculated.

Another object of my invention is to provide a dryer in which the yarn is simultaneously in contact with a fluid drying medium and a heated cylinder.

Another object of my invention is to provide a dryer in which the yarn is subjected to a fluid drying medium prior to contact with a heated drying cylinder.

Another object of my invention is to provide a dryer in which the recirculated fluid drying medium contacts the uninsulat-ed ends of the heated drying cylinders.

Another object of my invention is to provide a dryer in which large guide rolls are used to change the direction of travel of the yarn.

Another object of my invention is to provide a dryer in which the quantity and temperature of fresh drying medium and recirculated drying medium are positively controlled.

Another object of my invention is to provide a dryer in which adjustments may be made without danger of overheating.

.Another object of my invention is to provide a dryer in which individual threads of yarn are separated before entering the drying chamber.

Another object of my invention is to provide a dryer in which threads of yarn are prevented from sticking together and in which the drying is efficiently accomplished.

Other and further objects and advantages of my invention will be apparent from the following description taken in connection with the accompanying drawing in which like characters of reference designate corresponding parts throughout the several views, and wherein:

Fig. 1 is a top, plan View 01' a dryer embodying my invention.

2 Fig. 2 is a side elevation of the dryer shown in Fig. 1.

Fig. 3 is a perspective view seen from near the inlet end of the dryer.

Fig. 4 is a perspective view seen from near the outlet end of the dryer.

In the embodiment chosen for illustration, the Wet yarn, indicated at H], is divided by rollers l I, just prior to entering the drying chamber. Other dividing rollers l2 are located within the drying chamber, and these rollers further separate and divide the yarn before it contacts the first drying cylinder I3 which is positioned Within the drying chamber and at the end thereof most remote from the entrance port through which the yarn enters the drying chamber. After passing around the drying cylinder IQ for more than 270 of its periphery, the yarn then passes over large guide rolls i4 and it, each of which substantially reverses the direction of travel for the yarn. Dividing rollers iii are arranged between the guide rolls l4 and 15 to separate any threads that might have stuck together while in contact with the first drying cylinder it.

The guide roll It is positioned near the bottom of the drying chamber and directs the yarn onto a second drying cylinder H which is positioned near the bottom of the drying chamber and adjacent the end thereof at which the yarn enters the drying chamber. The yarn then passes around the drying cylinder I! so as to maintain contact therewith for more than 270 of its periphery, and then leaves the lower surface thereof and progresses tangentially across the bottom of the drying chamber, passes beneath drying cylinder [3, around which it is guided without again contacting the cylinder by guide roller I8 and then passes out of the drying chamber over guide roller It located at the end of the drying chamber most remote from the dividing rollers ll.

Positioned above the drying cylinder H, and communicating with the drying chamber by means of a blower housing 20, is a mixing chamber 2|. A damper 22 is arranged to control the admission of hot air, or other drying medium, to the mixing chamber 2| over the heating coils 23, and a damper 24 is arranged to control the admission of cold air, or other drying medium, to the mixing chamber. An alternative or supplementary damper 22' may be arranged as shown to control the admission of air over the heating coils 23. For the purpose of this description, the drying medium to be circulated through the apparatus will be considered to be air, though of course it will be appreciated by those skilled in the art that other gaseous drying mediums could be employed.

Air from the mixing chamber 21 is blown into the drying chamber by the fan 25 positioned in the blower housing 2% and as the air enters the drying chamber it impinges upon the perforated nozzle plate, 26 which lies in substantially parallel relation to the yarn passing between the entrance port and the initial point of contact with the periphery of the first drying cylinder ES. The nozzle plate 25 difiuses the drying air, and as the air passes through the many holes in the plate the yarn is subjected to a soft flow of heated air which passes between the threads at a sub stantially right angle to the yarns path of travel.

The drying air then sweeps downwardly over the yarn lying on a portion of thesurface'of each of. the drying cylinders I3 and I1, and this portion of its travel is directly opposed to the direction of travel of the yarn over Which it is sweeping. In its downward pathfthe air also again passes between the threads, and its path somewhatfollows the path of the yarn which is coursing downwardly between the guide rolls ill and 15.

-A bafile plate '28 arranged partially around the outer rim at each end of the drying cylinder ll permits thedrying air to contact the uninsulatdendsfof the cylinder, but prevents the dryin" airfromjby passingbeneath the cylinder ll. Similarly, a baffle plate 2'! arranged partially emanates enter rim at each end of the drying cylinder l closes th'e space between the cylinder heads and the walls of the enclosure, but

the cylinder ls'an'd sweep upwardly between the through the yarn into the, space between the two heated drying cylinders and around the outside surfac'es'of the cylinders, thereby increasing the drying rate. Reheating and recirculation of the air within the enclosure enable utilization of the A full capacity of the hot air to absorb moisture permitsajir tofcontact the uninsulated heads of 7 cylinder heads andthe walls of the enclosure and 7 into the recirculated air plenum chamber as situatedfabove' the drying cylinder [3 and arranged in contact with the drying chamber through theduc'ts provided between the side wallscf the enclosure and the heads of drying cylinder [3,as outlined by the baffle plates 27 and the vertical wall 30 which also serves to separatethe recirculated air plenum chamber 29 m th m x n cha e w pam er 3] is'farranged to control the flow of recirculateclv air from the chamber 29 'into the chamber 2 l ,T he recirculated air is heated by radiation and; by 'contact with the heads of the drying cylinder 13, and additional heat may be su Iiedfb heatingcoilstz, if desired. Air that fisl'not rec rculatedfpass'es beneath the cylinder [Sand into the'exl aust channel 33 between the cylinder I3 and the exit wall of'the enclosure,

n 't theex haust fan 34 in exhaust duct s 5: whichfis controlled by exhaust damper 35. A damper 36' provided over thecylinder E3 to regulate the flow of air around the top of the cylinderintothe exhaust channel; and damper B6 is provided to regulate the fiow of air between th'e 'chani ber 29 and the exhaust channel 33, as desired. r

The cylinders i1 and [3 shown in the accompanyihg drawing are5 ft. and 7 ft. in diameter, respectively, and are rated at 22 pounds per squar'e' inch working'pressure. Steam for heating the cylinders-is supplied through the axle connections'in the customary manner. The use of steampres'sures'in excess of 100 p. s. i. gauge will'rais'e the temperature of air passing through the steam coils equal to or greater than the cylinder'temperature; andtemperatures as high as 26551 can be maintained within most sections of the'enclosureand may reac h 290? F. inthe mixing Chamber. i i

of evaporation; and air is exhausted only after it has picked up a large amount of moisture, thereby increasing'efilciency.

In normal'operation, the recirculating damper Si is fullyfopen, and the cold air damper 24 1S completely closed. The inlet of heated air from theoutside can be regulated by damper 22 as required to maintain an efiicient drying atmospherewithin the enclosure. As is customary in dryers of the heated cylinder type, the cylinders l5 and H are rotated by the tension in the yarn passing around their peripheries. It is necessary to separate each individual thread before Winding onto the loom beam, and the tension re quired to do this is excessive and injurious-if threads are stuck together. Dividing rollers H divide the threads before they enter. the dryin'g chamber and thereby help prevent sticking and improve air circulation through the yarn. Addi tional dividing rollers [2 between the enclosure entrance and *the first drying cylinder further improve drying efficiency; and as the yarn'ispartially dried before making contact with the first drying cylinder, the yarn sticking together or to the heated drying cylinder is obviated: Theuse of large guide rolls i4 and [5, of a diameter approximating one-fourth the diameter or the smaller drying cylinder, to change the direction of travel of the yarn decreases the tension required in the yarn to rotate the equipment and complish this, thejhot air dampehZZ and recir cpa lating damper 31* are closed while air damper 24 and the exhaust damper 35} are opened, thereby allowing thefanszb andf 3 4 .topull 001 1 ts de air n orl t ou h thefle r closure and thus considerably reduce.the}enclosure 7 temperature. a r

It will be obvious to thoseskilljed intheart that many 'modifications and changes can. be made without'departing from the scope-o fimyjim vention as defined in the appended claims.

Iclaim: i 3

1. A dryer for slashers comprising} anenclosure with means defining. a drying chamberTthr'ough which yarn is passed; amixing chamber, andan exhaust channel; a heateddrying cylinder said drying chamber; means arranged to o the admission of "fluid drying'mediuintd said mixing chamber; means arranged to cause fluid drying medium from said mixing chamber to flow through the yarn within said drying chamber before the yarn reaches said drying cylinder; said drying cylinder being arranged in heat exchange relation with said fluid drying medium in said drying chamber; and means arranged to control the recirculation of fluid drying medium from saidldrying chamber to said mixing chamber.

2. A dryer for slashers comprising an enclosure with means defining a drying chamber through which yarn is passed, a mixing chamber, and an exhaust channel; a heated drying cylinder within said drying chamber; means for dividing the yarn before it reaches said drying cylinder; means arranged to control the admission of fluid drying medium to said mixing chamber; means arranged to cause fluid drying medium from said mixing chamber to flow through said yarn within said drying chamber before the yarn reaches said drying cylinder; said drying cylinder being arranged in heat exchange relation with said fluild drying medium in said drying chamber; means arranged to control the recirculation of fluid drying medium from said drying chamber to said mixing chamber; and means arranged to control the flow of fluid drying medium from said exhaust channel.

3. A dryer for slashers comprising an enclosure with means defining a drying chamber through which yarn is passed, a mixing chamber, and an exhaust channel; a plurality of heated drying cylinders Within said drying chamber; means for dividing the yarn before it reaches the first drying cylinder; means arranged to control the admission of fluid drying medium to said mixing chamber; means arranged to cause fluid drying medium from said mixing chamber to flow through said yarn within said drying chamber before the yarn reaches the first drying cylinder; said drying cylinder being arranged in heat exchange relation with said fluid drying medium in said drying chamber; means arranged to control the recirculation of fluid drying medium from said drying chamber to said mixing chamber; and means arranged to control the flow of fluid drying medium from said exhaust channel.

4. A dryer for slashers comprising an enclosure with means defining a drying chamber, a mixing chamber, and an exhaust channel; a plurality of heated drying cylinders within said drying chamber; means arranged to control the admission of fluid drying medium to said mixing chamber; means arranged to cause fluid drying medium from said mixing chamber to flow through the yarn before it reaches the first drying cylinder; means arranged to control the recirculation of fluid drying medium from said drying chamber to said mixing chamber; and means, between said drying cylinders for changing the direction of travel of said yarn, said last mentioned means comprising rolls having a diameter substantially equal to one-fourth the diameter of one of said drying cylinders.

5. A dryer for slashers comprising an insulated enclosure with means defining a drying chamber through which yarn is passed, a mixing chamber, and an exhaust channel; a plurality of heated drying cylinders within said drying chamber; means for dividing the yarn before it reaches the first drying cylinder; means arranged to control the admission of fluid drying medium to said mixing chamber; means arranged to deliver fluid drying medium from said mixing chamber and to cause said fluid drying medium to flow through said yarn within said drying chamber before the yarn reaches the first drying cylinder; said drying cylinder being arranged in heat exchange relation with said fluid drying medium in said drying chamber; means arranged to control the recirculation of fluid drying medium from said drying chamber to said mixing chamber; and means arranged to control theflow of fluid drying medium from said exhaust channel.

6. A dryer for slashers comprising an insulated enclosure with means defining a drying chamber, a mixing chamber, and an exhaust channel; a plurality of heated drying cylinders Within said drying chamber; means for dividing the yarn before it enters the drying chamber; means within said drying chamber for further dividing the yarn before it reaches the first drying cylinder; nozzle means positioned within said drying chamber and arranged to direct and distribute a flow of fluid drying medium through the yarn before it reaches the first drying cylinder; means arranged to control the admission of fluid drying medium to said mixing chamber; means arranged to deliver fluid drying medium from said mixing chamber and deliver the same to said nozzle means in said drying chamber; means arranged to control the recirculation of fluid drying medium from said drying chamber to said mixing chamber; and means arranged to control the flow of fluid drying medium from said. exhaust channel.

7. A dryer for slashers comprising an insulated enclosure with means defining a drying chamber, a mixing chamber, and an exhaust channel; a plurality of heated drying cylinders within said drying chamber; means for dividing the yarn before it enters the drying chamber; means within said drying chamber for further dividing the yarn before it reaches the first drying cylinder; nozzle means positioned within said drying chamber and arranged to direct and distribute a flow of fluid drying medium through the yarn before it reaches the first drying cylinder; means arranged to control the admission of heated fluid drying medium to said mixing chamber; means arranged to control the admission of unheated fluid drying medium to said mixing chamber; means arranged to deliver fluid drying medium from said mixing chamber and deliver the same onto said nozzle means in said drying chamber; means arranged to control the recirculation of fluid drying medium from said drying chamber to said mixing chamber; means arranged to control the flow of fluid drying medium over the first of said drying cylinders in the path of the yarn and into said exhaust channel; and means arranged to control the flow of fluid drying medium from said exhaust channel.

8. A dryer for slashers comprising an insulated enclosure with means defining a drying chamher, a mixing chamber, and an exhaust channel; a plurality of heated drying cylinders within said drying chamber; means for dividing the yarn before it enters the drying chamber; means within said drying chamber for further dividing the yarn before it reaches the first drying cylinder; a perforated nozzle plate positioned within said drying chamber and arranged to direct and distribute a flow of fluid drying medium through the yarn before it reaches the first drying cylinder; a damper arranged to control the admission of a heated fluid drying medium to said mixing chamber; a damper arranged to control the admission of an unheated fluid drying medium to said mixing chamber; means arranged to deliver fluid drying medium from said mixing chamber and 7 8 deliver the sarfiefonigQLsaid nozzle gila te m saigl REFERENCES: CITED chamber?" a"damperiamangedgtomcontml The following references are of record in -the -th rcirculati'n-bfiflui'd-i drying medium from file thisv patent;

said drying chamber mo -said mixing-nhamb'en; a damper armng edtocontnol the flaw of fluidfdry- 5 UNITED STATES PATENTS linglmedium-overthe firstof said; drymgeylinders Number Name Date in thei path of the yarnand: 'intoisa-id .exhakust 357208 Kenyon -.F8b.1'8, 1887 channel; and a. damper armngedsktioicontrolithe 1,426,095 -Parker Aug.11,5,1922 flowof fluid dryingmedium irom 'saidi exhaust 2,185,747 Griifin -Jan. 2, 1940 channel. 19 2,225,166 Erby Dec. 17,.1940

2,301,249 Butterworth -I\T0-.,'1O,11=942 r 2,309,961 King fFBb.2,.194.3 

